Slider support 3 decimal places

<?php

// Add the following to your (child) theme's functions.php

add_action( 'wp_footer', function() {
?>
<script>
(function($) {
    if ( 'undefined' !== typeof FWP ) {
        FWP.hooks.addFilter('facetwp/set_options/slider', function(opts, extras) {
            opts.format = {
                to: function(value) {
                    return nummy(value).format('0.000');
                },
                from: function(value) {
                    return value;
                }
            };
            return opts;
        });
    }
})(jQuery);
</script>
<?php
}, 100 );